SMI® And Small/Middle/Large: Adjustment Of Index Calculation With Free Float

In accordance with the criteria set forth in the SMI® Index Rules, the share issue EMS CHEMIE HOLDING AG (ISIN:CH0001587036) has been eliminated from the SMI® because it no longer fulfills the regulatory criteria.

All adjustments to the index take effect on 1 October 2001. At that time, the SMI® will comprise 28 issues (versus the previous total of 29).

The most significant changes in the S/M/L segmentation lists are as follows:

Increasing in rank:

From Small to Middle:

• GALENICA N (ISIN:CH0002351408 and CH0001773719)
• LEICA GEOSYSTEMS N (ISIN:CH0010870480)
• LUZERNER KB N (ISIN:CH0011693600)

From Large to Middle:

• CIBA SPEZIAL CHEMIE N (ISIN:CH0005819724)
• CLARIANT N (ISIN:CH0012142631)
• LONZA GRP N (ISIN:CH0009493658)

• DAY INTERACT HOLDING N (ISIN:CH0010474218)
• CROSSAIR GS (ISIN:CH0001626826)
• THINK TOOLS (ISIN:CH0010497714)
• GRETAG IMAGING HOLDING N (ISIN:CH0008984384)
• MIKRON HOLDING N (ISIN:CH0003390066)
• DISTEFORA HOLDING (ISIN:CH0004111313)
• INFICON HOLDING N (ISIN:CH0011029946)

Désormais, le calcul de la capitalisation boursière d'une valeur sera basé sur In a new development, the computation of market capitalisation shall in future be based on the number of freely tradable shares (free float). Shares that are in a state of fixed ownership (e.g. government-owned shares, stock that is bound by shareholder agreements or restricted as to sale via lock-up provisions, etc.) shall no longer be taken into account in calculating the amount of equity capital in circulation.

Introduction of the free-float method shall take place on 1 October 2001. Because the Index Rules stipulate that the criteria for a change in the composition of the index must have been met for a period of four successive quarters, the first adjustments based on the free-float method shall take place on 1 October 2002 at the earliest.

The figures that are relevant in this regard to SPI® issues are to be ascertained via a capital survey of issuers that is being conducted during the month of July 2001. As a new rule for additions and for the remaining in the SPI® universe a 20% free float is required.

The Index Rules of the SWX Swiss Exchange have been revised accordingly. They are available on the Internet at

http://www.swx.com/products/

products_indexfamily_en.html for perusal by those interested.